Core/MMAPS: Revert walkableClimb/Height config changes

Fixes movement on some stairs
Needs more research

src/tools/mmaps_generator/MapBuilder.cpp

@@ -518,8 +518,8 @@ namespace MMAP
         config.walkableRadius = m_bigBaseUnit ? 1 : 2;
         config.borderSize = config.walkableRadius + 3;
         config.maxEdgeLen = VERTEX_PER_TILE + 1;        // anything bigger than tileSize
-        config.walkableHeight = m_bigBaseUnit ? 2 : 4;
-        config.walkableClimb = m_bigBaseUnit ? 1 : 2;   // keep less than walkableHeight
+        config.walkableHeight = m_bigBaseUnit ? 3 : 6;
+        config.walkableClimb = m_bigBaseUnit ? 2 : 4;   // keep less than walkableHeight
         config.minRegionArea = rcSqr(60);
         config.mergeRegionArea = rcSqr(50);
         config.maxSimplificationError = 1.8f;           // eliminates most jagged edges (tiny polygons)